{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell type", "RNA", "DNA", "cell line", "protein"], "input": "Thus, Elf-1 is a novel transcription factor that appears to be required for the T-cell-receptor-mediated trans activation of HIV-2 gene expression ."}
{"cell type": [], "RNA": [], "DNA": [], "cell line": [], "protein": ["Elf-1", "novel transcription factor"]}